﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;

public partial class Download : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        string strURL = Server.MapPath("MyFirstPDF.pdf"); 
        if (File.Exists(strURL))
        {
            Response.ContentType = "application/pdf";
            Response.AppendHeader("Content-Disposition", "attachment; filename=\"" + strURL + "\"");
            Response.TransmitFile(Server.MapPath("MyFirstPDF.pdf"));
            Response.End();
        }
    }
}